F-22

[amarito]

Identification de l'origine (problème mécanique sur une valve) des deux incidents les plus récents (Hawaii et Virginie), sans rapport a priori avec la série inexpliquée d'hypoxies.

http://www.turnto23.com/news/31276225/detail.html

"But two recent incidents related to the F-22 oxygen system are considered regular mechanical issues not connected to the oxygen deprivation investigation, according to Air Force Lt. Col. Tadd Sholtis, a spokesman for the Air Force's Air Combat Command.

"The recent incidents that have resulted in new expressions of concern are of a different kind than the ones we have been focused on in recent months," Sholtis told CNN's Security Clearance.

Air Force officials have labeled the number of unexplained F-22 breathing incidents as "cause unknown," while labeling the two recent incidents as "cause known."

[Chris.]

Pile a combustible, Accu lithium, condo de décharge aurait il pu faire alternative a l'hydrazine ?

Bien sûr, il n'y a qu'à voir les Gripen, Hornet, etc. qui n'utilisent pas d'hydrazine...

[amarito]

Problem solved 

"After receiving assurances that these corrective measures would minimize hypoxia-like events in the F-22, (Defense Secretary Leon Panetta) approved the Air Force planned sequence of actions to remove flight restrictions over time. This process starts today,"

http://www.reuters.com/article/2012/07/24/us-usa-planes-oxygen-idUSBRE86N19520120724

[Philippe Top-Force]

http://www.air-cosmos.com/defense/le-f-22-reprend-son-souffle.html

http://www.journal-aviation.com/actualites/18190-les-cas-d-hypoxie-du-f-22-resolus

[Chevalier Gilles]

c'est une grande nouvelle

[Philippe Top-Force]

c'est une grande nouvelle

Trop vite dit  :lol: http://www.flightglobal.com/news/articles/in-focus-f-22-pilots-and-engineers-not-convinced-usaf-has-found-root-cause-of-raptors-oxygen-woes-374893/

http://news.yahoo.com/f-22-fighter-loses-79-billion-advantage-dogfights-201119575--abc-news-topstories.html

The United States has spent nearly $80 billion to develop the most advanced stealth fighter jet in history, the F-22 Raptor, but the Air Force recently found out firsthand that while the planes own the skies at modern long-range air combat, it is "evenly matched" with cheaper, foreign jets when it comes to old-school dogfighting.

The F-22 made its debut at the international Red Flag Alaska training exercise this June where the planes "cleared the skies of simulated enemy forces and provided security for Australian, German, Japanese, Polish and [NATO] aircraft," according to an after-action public report by the Air Force. The F-22 took part in the exercise while under strict flying restrictions imposed by Defense Secretary Leon Panetta in light of mysterious, potentially deadly oxygen problems with the planes - problems that the Pentagon believes it has since solved.

The Air Force said the planes flew 80 missions during the event "with a very high mission success rate." However, a new report from Combat Aircraft Monthly revealed that in a handful of missions designed to test the F-22 in a very specific situation - close-range, one-on-one combat - the jet appeared to lose its pricey advantages over a friendly rival, the Eurofighter Typhoon, flown in this case by German airmen.

"We expected to perform less with the Eurofighter but we didn't," German air officer Marc Grune said, according to Combat Aircraft Monthly. "We were evenly matched. They didn't expect us to turn so aggressively."

Two other German officers, Col. Andreas Pfeiffer and Maj. Marco Gumbrecht, noted in the same report that the F-22's capabilities are "overwhelming" when it comes to modern, long-range combat as the stealth fighter is designed to engage multiple enemies well-beyond the pilot's natural field of vision - mostly while the F-22 is still out of the other plane's range. Grumbrecht said that even if his planes did everything right, they weren't able to get within 20 miles of the next-generation jets before being targeted.

"But as soon as you get to the merge…" Pfeiffer said, referring to the point at which fighters engage in close-up dog fighting, "in that area, at least, the Typhoon doesn't necessarily have to fear the F-22 in all aspects… In the dogfight the Eurofighter is at least as capable as the F-22, with advantages in some aspects."

In response to the report, a spokesperson for the Air Force, Lt. Col. Tadd Sholtis, told ABC News that one-on-one combat is only one way to evaluate an aircraft's capabilities and said it's not "necessarily the most relevant to every scenario."

"The F-22 is conceived and employed as part of an integrated force that provides offensive capabilities that make close engagements far less likely while retaining the ability to handle close engagements in tandem with other fighters," he said.

Air Force Gen. John Jumper, one of the few airmen to have flown both aircraft, said in 2005 that it is difficult to compare the F-22 and the Eurofighter.

"They are different kinds of airplanes to start with," he said, according to an Air Force Print News report. "It's like asking us to compare a NASCAR car with a Formula 1 car. They are both exciting in different ways, but they are designed for different levels of performance."

The F-22 "can maneuver with the best of them if it has to, but what you want to be able to do is get into contested airspace no matter where it is," Jumper said, referring to the F-22's stealth and supercruise capabilities that are meant to allow the plane to sneak in to hostile territory undetected - an ability the non-stealth Eurofighter lacks.

As for where that contested airspace may be, the Air Force hasn't said. But in April 2011 an executive for Lockheed Martin, the primary manufacturer of the F-22, told ABC News that the plane could "absolutely" find a home in quick strike missions against countries like Iran or North Korea. Over the weekend, the Air Force deployed a squadron of F-22s to Kadena Air Base in southern Japan just over 800 miles south of the North Korean border - a move that comes three months after an undisclosed number of the stealth jets were deployed to an allied base in the United Arab Emirates, some 200 miles from the Iranian mainland.

The F-22 is the single most expensive fighter jet in history at a total acquisition cost of an estimated $79 billion for 187 planes, meaning each plane costs approximately $420 million. Estimates for the Eurofighter Typhoon - the premier fighter for several allied countries including the U.K., Germany and Italy - put that plane at just under $200 million each, according to an April 2011 report by England's Public Accounts Committee.

"[Red Flag was] a mission to get to know each other, the first contact by German Eurofighters in the continental U.S.," Grune said of mock-fighting the F-22s. "We are not planning on facing each other in combat. We want to work together but it was a starter for us to work together. They were impressed, as we were impressed by them."

[zx]

http://www.flightglobal.com/blogs/the-dewline/2012/08/first-supersonic-aim-9x-from-a.html

At Edwards AFB, California, the F-22 combined test force recently conducted its first supersonic AIM-9X Sidewinder launch. Major Ryan Howland flew that first test sortie on 30 July.2012_F22_Supersonic_AIM9X.jpg

Here is an excerpt from an earlier story I did that covers the USAF's efforts to upgrade the Raptor. The full story can found here.

In 2014, the USAF will start to field Increment 3.2A. The software-only modification "incorporates new electronic protection techniques and improves the situational awareness of the pilot with the addition of new combat identification techniques", Williams says. It will also correlate data from the Link 16 data-link and fuse it with the F-22's integrated sensors.

That effort will be followed up with an Increment 3.2B upgrade. A Milestone B decision to go ahead with the procurement of Increment 3.2B is planned for December 2012, Williams says. "Kit procurement begins in fiscal year [2016] with kit deliveries in [the third quarter of] fiscal year [2017] and initial installations completed in [the first quarter of fiscal year [2018]," he says.

Increment 3.2B is a hardware and software upgrade that will fully incorporate the

AIM-120D and AIM-9X air-to-air missiles in addition to further upgraded geo-location and electronic protection capabilities.

But according to a recent Government Accountability Office (GAO) report, it will no longer add the capability to independently re-target eight SDBs at eight separate targets or an automatic ground collision avoidance system (Auto-GCAS). A USAF Scientific Advisory Board study on the Raptor's ongoing oxygen system woes has recommended that an Auto-GCAS be implemented.

Increment 3.2B is a much more complicated upgrade than the previous efforts.

"We will be implementing a new enhanced stores management system, increasing the ability of the aircraft to communicate with the weapons," Williams says. "This change will provide a common split-bus architecture for the Block 30/35 aircraft to support the increased communication requirements of newer weapon systems."

However, the USAF cannot wait until 2017 to launch its newest air-to-air weapons from the Raptor. The service is planning to add a "rudimentary" capability to carry both the AIM-9X and AIM-120D before Increment 3.2B is completed.

The AIM-120D will be added first in Update 4, which the service plans to release to the fleet in 2013. The AIM-9X will be added in Update 5, which is set for a 2015 release. "The AIM-9X effort in Update 5 also serves as a risk reduction activity for Increment 3.2B," Williams says.

Every aircraft from Tail 03-4045 onwards will receive Increment 3.2A and B, says ACC. According to a recent Government Accountability Office report, the cost of the Raptor upgrade programme will total about $9.7 billion.

A further update called Increment 3.2C has recently been renamed Increment 3.3, but the capabilities that it might include have not yet been defined. Williams says it will focus on making sure the Raptor remains compatible with new air traffic control systems.

"The effort will be focused on maintaining airspace access and endeavour to include all of the current airspace mandates like Mode S and Mode 5 as well as other FAA/ICAO mandated requirements," he says.

The F-22 System Program Office is still working on trying to graft an open systems architecture to the jet's computers.

Meanwhile, the Flight defense team is in Las Vegas, Nevada, for AVUSI's Unmanned Systems North America 2012 show. So watch for our coverage.

[MH]

Une photo meilleure

[alexandreVBCI]

Lors de l’exercice Red Flag Alaska qui s’est déroulé en juin dernier, les F-22 Raptor ont semblé avoir eu de nouveau beaucoup de mal lors de combats aériens rapprochés.

Certes, sur les 80 missions réalisés au cours de l’exercice, les F-22 Raptor affichent un « taux de réussite élevé ». Sauf pour quelques sorties où il s’est agi, selon Combat Aircraft Monthly, cité par ABC News, de tester leurs capacités en dog fight, à un contre un, en opposition aux Eurofighter Typhoon de la Luftwaffe.

« Dans ce domaine, au moins, le Typhoon n’a pas nécessairement à craindre le F-22″ a commenté le colonel allemand Andreas Pfeiffer. « Au cours du combat, l’Eurofighter est au moins aussi efficace que le F-22, avec des avantages dans certains aspects » a-t-il ajouté.

L'article complet :

http://www.opex360.com/2012/08/09/le-combat-aerien-rapproche-nest-decidement-pas-le-point-fort-du-f-22-raptor/

[Cougar133]

"German air officer Marc Grune said"

tiens donc , n'est ce pas ce major qui a fait un séjour en france et qui a mangé 2 Raf au pti dej' il y a quelques temps ? 

[TMor]

Si.  :lol:

[Chaps]

Ca commence à être lourd....

On en arrive dans des articles pitoyables à transformer en victoire 1 match nul sur 6 engagements ! et quelques screenshots de gun shots non contextualisés sur plusieurs dizaines de combats. Mais c'est la Pravda ou quoi?? D'autant que le WVR n'est que le dernier segment, rare, d'une longue série de possibilités de tirs à longues ou moyennes portées.

Ce qui exceptionnel pour le F-22, c'est qu'avec son poids, son volume et ses formes, il arrive encore facilement à être sur le podium, sinon en tête largement, des meilleurs dogfighters de tous les temps.

Et en BVR, il est sur une autre planète.

Comme disaient ses ingénieurs design "Not a pound for air to ground !"

[Klem]

Ce qui exceptionnel pour le F-22, c'est qu'avec son poids, son volume et ses formes, il arrive encore facilement à être sur le podium, sinon en tête largement, des meilleurs dogfighters de tous les temps.

Vu le prix de l'engin, c'est pas exeptionnel: c'était prévu et couteusement financé.

Comme disaient ses ingénieurs design "Not a pound for air to ground !"

C'est pas pour le F15 que les ingénieurs disait ça?

[Chevalier Gilles]

C'est pas pour le F15 que les ingénieurs disait ça?

si aussi et pourtant

[Chaps]

Vu le prix de l'engin, c'est pas exeptionnel: c'était prévu et couteusement financé.

Le prix ne permet pas de tordre les règles de la physique.

Tu me donnerais un milliards de $ que je n’inventerai pas nécessairement des objets hyper performants.

Il y a un vrai exploit d’ingénierie d'arriver à faire danser cet obèse dans le ciel.

[Klem]

Le prix ne permet pas de tordre les règles de la physique.

Tu me donnerais un milliards de $ que je n’inventerai pas nécessairement des objets hyper performants.

Il y a un vrai exploit d’ingénierie d'arriver à faire danser cet obèse dans le ciel.

Enfin, avec 30T de poussée et la TVC, je ne dis pas que c'est facile mais c'est pas non plus un miracle.

D'ailleur il n'est pas obèse, il est juste grand comparé aux eurocanards et autre mirage

[TMor]

Et ik a une sublime voilure avex tout a. Ce n'est pas juste in bloc informe de plomb...

[Eise]

En effet. Clavier étranger Tmor?  ;)

[Klem]

Et ik a une sublime voilure avex tout a. Ce n'est pas juste in bloc informe de plomb...

+1

Il est nettement plus beau et racé que son petit frère (F35 aka le pigeon obèse) et je dirait même qu'il est presque aussi beau que le F-15, bien que les contraintes de la furtivité casse un peu le design.

[bubzy]

Ca commence à être lourd....

On en arrive dans des articles pitoyables à transformer en victoire 1 match nul sur 6 engagements ! et quelques screenshots de gun shots non contextualisés sur plusieurs dizaines de combats. Mais c'est la Pravda ou quoi?? D'autant que le WVR n'est que le dernier segment, rare, d'une longue série de possibilités de tirs à longues ou moyennes portées.

Ce qui exceptionnel pour le F-22, c'est qu'avec son poids, son volume et ses formes, il arrive encore facilement à être sur le podium, sinon en tête largement, des meilleurs dogfighters de tous les temps.

Et en BVR, il est sur une autre planète.

Comme disaient ses ingénieurs design "Not a pound for air to ground !"

Je te rejoins complètement. Et faut voir l'article d'aerobuzz et d'autres... ça devient n'importe quoi, vraiment.

et voici ma pensée: http://portail-aviation.blogspot.fr/2012/08/leurofighter-mange-du-f22-raptor-en.html

[zx]

Enfin, je vois mal le raptor venir faire du dogfight avec un adversaire potentiel dans un conflit, il attendra tranquillement l'info d'un awacs caché dans son coin pour mater en bvr, et il fera couic sur le zoziau qui s'amènera. pas vu pas pris.

Ce qui m'étonne, c'est pourquoi ils exposent en exercice le raptor, il pouvait très faire des manoeuvre en interne avec des f15/f16/f18.

Tant qu'il gardait son mystère, loin des yeux, il avait un rôle d'épouvantail à moineau

[Raoul]

A combien portent les missiles AA longue portée des F22 ?

[zx]

Avec les aim120c7, 110km, mais le aim120D devrait avoir une porté de 160-180km avec son ramjet. Si je dis pas de bêtise.

[seb24]

Enfin, je vois mal le raptor venir faire du dogfight avec un adversaire potentiel dans un conflit, il attendra tranquillement l'info d'un awacs caché dans son coin pour mater en bvr, et il fera couic sur le zoziau qui s'amènera. pas vu pas pris.

Ce qui m'étonne, c'est pourquoi ils exposent en exercice le raptor, il pouvait très faire des manoeuvre en interne avec des f15/f16/f18.

Tant qu'il gardait son mystère, loin des yeux, il avait un rôle d'épouvantail à moineau

Y'a la réponse dans ton message. Le dogFight c'est plus vraiment le boulot principal du F-22. Donc rien de vraiment très secret.

[Raoul]

Avec les aim120c7, 110km, mais le aim120D devrait avoir une porté de 160-180km avec son ramjet. Si je dis pas de bêtise.

OK, merci.

Je suppose que ce sont des portée max contre des "gros cul". Contre un avion de combat ça doit être moins.